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Project Presentation
The document summarizes an experiment investigating the use of anion exchange resins (AER) to remove and regenerate phosphate and nitrate from wastewater. Key points: - AER were able to remove phosphate and nitrate from wastewater through a series of filtrations lasting up to 178 hours with effluent concentrations within regulatory limits. - The resins were then regenerated using salt solutions, achieving regeneration rates of 78-100% for phosphate and 34-95% for nitrate over multiple cycles. - In a final test, the resins were able to regenerate 100% of phosphate and 34% of nitrate when exposed to real wastewater, demonstrating the potential
Project Presentation
- 1. Removal and Regenerationof Phosphate and Nitrate from Wastewater Using Anion Exchange Resins Zi Ye EN 800 Special Project 2014 Fall Professor Meng 1
- 2. Outline •Introduction •Experiment Design •Results andDiscussion •Conclusion 2
- 3. 1 Introduction-Pollutants Pollutants ApplicantsEnvironmental Impact Phosphorus (Phosphate-P) Fertilizer; Water softening; Metallurgical aspects (steel production) • Toxicosis (eutrophication) • Marine toxicity(cause the death of fish) Nitrogen (Nitrate-N) Fertilizer; Nitrogen gas; Nitrogen compounds • Toxicosis (eutrophication) • Human health effects(blue baby syndrome) • Marine toxicity(cause the death of fish) Table 1 Pollutants 3
- 4. Introduction-Continued Methods Materials AdvantageDisadvantage Nancy, et al. (2015) Adsorption Batch Experiment hydrated metal oxides, anionic exchange media Removal Rate Reached 86% (HFeO) Multiple materials were difficult to get Jie, et al. (2015) Adsorption Batch Experiment activated aluminum oxide, lanthanum oxide Achieved both removal and recovery of phosphate High Operation Temperature Required (140- 800℃） Sari Kilpimaa, et al. (2015) Adsorption Batch Experiment carbon residue, activated carbon residue, commercial activated carbon Low Cost Low Removal Efficiency Table 2 Previous Research (on Phosphate and Nitrate Removal) 4
- 5. Introduction-This Research • AnionExchange Resins (AER) Advantages Disadvantages • Remove and Regenerate • Fast Reaction • Reusable • High Cost Material: Methods • Filtration Experiment 5
- 6. 6 2 Experiment Design-Filtrationand Regeneration Start Experiment Setup 2nd Filtration 5th Filtration 4th Filtration 3rd Filtration 1st Filtration Prepare Materials 5th Regeneration 4th Regeneration 3rd Regeneration 2nd Regeneration 1st Regeneration Data AnalysisEnd
- 7. Experiment Design-Filtration andRegeneration Figure 1 Filtration and regeneration experiment set up 1 4 3 2 4 3 21 Up Flow Down Flow 7
- 8. Table 3 FiltrationExpriment Conditions 3 Results and Discussion-Filtration 8 Original PO4 3-—P (ppm) Original NO- 3 —N (ppm) Flow Rate (ml/min) Flow direction Total time filtered (hour) 1 4.895 45 4 Up 17 2 4.895 45 4 Up 19.5 3 3.161 4.516 4 Up 86 4 3.161 4.516 4 Up 130 5 3.642 4.210 4 Down 178 Retention Time=5min Effluent Concentration Range from Previous Research and NJDEP
- 9. Results and Discussion-Filtration 0 1 2 3 4 5 6 010 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 Concentration(ppm) Time (h) 1st Filtration 2nd Filtration 3rd Filtration 4th Filtration 5th Filtration Figure 2 Resins Filtration Results for Phosphorus 9
- 10. Results and Discussion-Filtration 0 1 2 05 10 15 20 Concentration(ppm) Time (h) Filtration PO4 3--P 1st Filtration 2nd Filtration 3rd Filtration 4th Filtration 5th Filtration Figure 2 Resins Filtration Results for Phosphorus-continued 10
- 11. Results and Discussion-Filtration 0 1 2 3 4 5 6 7 8 010 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 Concentration(ppm) Time (h) 1st Filtration 2nd Filtration 3rd Filtration 4th Filtration 5th Filtration Figure 3 Resins Filtration Results for Nitrogen 11
- 12. Results and Discussion-Filtration 0 1 2 3 4 5 6 7 8 9 05 10 15 20 Concentration(ppm) Time (h) Filtration NO3 --N 1st Filtration 2nd Filtration 3rd Filtration 4th Filtration 5th Filtration Figure 3 Resins Filtration Results for Nitrogen-Continued 12
- 13. Table 3 RegenerationExperiment Conditions Regeneration Solution Flow rate (mL/min) Regeneration Rate for P Regeneration Rate for N Flow direction 1 400mL 10% NaCl 10 78% 95% Down 2 400mL 6% NaCl 2.6 100% 75% Down 3 300mL 5% NaCl 4 100% 57% Down 4 715mL 1% NaCl 4 100% 65% Down 5 700 mL wastewater 4 100% 34% Down Results and Discussion-Regeneration 13
- 14. Figure 4 ResinsRegeneration Results for Phosphorus 0 200 400 600 800 1000 1200 1400 1600 0 50 100 150 200 250 Concentration(ppm) Volume(mL) Regeneration for PO4 3--P 1st Regeneration 2nd Regeneration 3rd Regeneration 4th Regeneration 5th Regeneration Results and Discussion-Regeneration 14 78% 100%
- 15. 0 1000 2000 3000 4000 0 50 100150 200 250 300 350 Concentration(ppm) Volume(mL) Regeneration NO3 --N 1st Regeneration 2nd Regeneration 3rd Regeneration 4th Regeneration 5th Regeneration Figure 5 Resins Regeneration Results for Nitrogen Results and Discussion-Regeneration 15 95% 75% 57% 65% 34%
- 16. Figure 6 UsingReal Wastewater to Regenerate Phosphate (Left) and Nitrate from Resins (Right) 0 200 400 600 800 1000 1200 0 100 200 300 400 500 600 700 800 concentraion(ppm) Volume (mL) 0 10 20 30 40 50 60 70 80 90 100 0 100 200 300 400 500 600 700 800 concentraion(ppm Volime (mL) Results and Discussion-Application in wastewater (5th Regeneration) 16 100% 34%
- 17. 17 Anion Exchange Resins(AER) can remove phosphate and nitrate with high efficiency, as well as release them AER reaction can last up to 180 hours in this experiment The regeneration rate for phosphate and nitrate reached 78%~100%, 34%~95%, respectively 4 Conclusion
- 18.